Slug casting machine



Feb. 1940- H. T. SUNDSTROM ET AL SLUG CASTING MACHINE Filed Feb 4, 1939 4 Sheets-Sheet 1 m, Q Q

INVENTORS BY. My IJWWATTORNEIFS Feb. 6, 1940. I H. T. SUNDSTROM El AL swe CASTING MACHINE Filed Feb.- 4, 1939 4 Sheets-Sheet 2 ullnllllll llllln m VENTORS fizlmtl A; l ,4 IMA TTORNEYS Feb. 6, 1940. H. T. SUNDSTROM El AL 2,138,988

SLUGCASTING ACHINE Filed Feb. 4, 1939 4 Sheets-Sheet I5 7 7. INVENTORJ W V I BY 6. 4 QT E M41; ATTORNEY;

Feb. 6, 1940. 'H. T. SUNDSTROM ET AL 2,133,938

swa CASTING ncamn 4 Shets-Sheet 4 Filed Feb. 4. 1939 INVENTORS W. 7

c. 4. 6; L ATTORNEYS Patented Feb. 6, 1 940 i I v v I I i p h v "UNITED STATES PATENT OFFICE I SLUG CASTING MACHINE Herman T. Sundstrom and Clarence A; Stopple,

Houston, Tex., assignors to -MergenthalerLinotype Company,a corporation "of New York Application February 4, 1939, Serial No. 254,585

16 Claims. (01. 199--50) This invention relates to slug casting machines adjustment of the left-hand jaw, it has been of" the general organization represented inU. S. found in practice that after the bushing has LettersPatent :to O. Mergenthaler, No; 436,532 beenturned the adjustment-so made is frequently wherein circulating matrices and interposed disturbed when the clamping screw is .retighte spacers are assembled in line and then presented ened. I j against the front face of a slotted mold Where The present invention is intended toenable the they :are expanded or justified between a pair operator to make an adjustment of the left-hand of confining jaws, the mold filled with molten jaw in ;-fractions of less than ahalf-e W t O metal to form type bar or slug against the the necessity of loosening and thereafter retightmatrices which produce the type characters ening the-clamp ss w the b lo "thereon, and,ifin'ally, after the casting operation, ing. To this end, the usual bushing in the leftelevated from the jaws and distributed; ha d bearing s r p a d w t one hav an In practice, it is necessary to change frequently auxiliary bushing ad-justably mou thelieifiw thelength of the slugsproduced, according to the In ass mt yt e s n us si mp d in the v 15 width or measure of the page or column to be lefta d be i in the way, wi inner .1 printed. In consequence, the mold slot in which e d in pesitionte p t the anti-Wear o to the slugs are cast is made variable in length, and bank against it as the-Wedge rises prior to justione of'the confining jaws is made adjustable to Yficetien, d t auxiliary b h an Cleei correspond so that lines of one length oranother', i the an -Wear shoe-se t p e Sl ried' by a sustaining member which is adapted W en, however, it is es ed to ast S u s andarranged to be adjusted in em or h If-em to bastard measuresor-in fractions of less than along a toothed rod mounted in bearings secured n m; he-auxiliary bushing is adjustedunv to the'vise frame of the machine. At-a point bet h in d thereof protrudes y nd-the tween the bearings, the rod is provided with a inner end: of theafixed main bush ng r qu d fixed collar which abuts against a verticarreamount nd hrou the nti-we r sh e and ciprocating Wedge, the latter being supported h d Sets t othed rod and-the J' W 'facewise by an intermediate anti-wear shoe the t li e distance. i whichrba-nks against the inner end of a bushing Inv the acc p ny drawings, e nve on clamped in the left-hand bearing. Inrising, the has. e shown m yin preferred forms d13 wedge forces the rod and'the jaw coupled thereto layay e amp but Obvious y many chang slightly to the right against the action of a spring d var ations may be-made therein and in its soas to position the-jaw exactly to measure prior mede f PP Q l St be comprised to the expansion orjustification of the line be- Within -S i h l iit e efore, belmdertween the jaws, and, in descending, the wedge oo that,,thez inventionis not limitedto any .35

- allows the spring to retract the rod a similar dispe form embodiment 1 x p insofar as tance so that the line may be lifted readily from .s h limitationsare Sp in the ms. 1 the-jaws for distribution after the casting opera- Referring 430 e drawings: t V mo Fi -1 isatop plan View of one embodiment-o 4 The left-hand bearing is split, and the bushing e invention t Vise r m being i i at by A! "against the inner end of which the anti-wear broken'lines; 'I

shoe banks is threaded therein and maintained 3,2 is nl rs d Vermeer seetion tak in'fixed position by means of a clamping screw.. 1a1ergthe1ine22' EL; I Ordinarily, therefore; the jaw is adjustable only 3 J ar rsp e w O a plurality 0f to'standard slug measures, namely, ems or halfl Washers of re t p i ts s 'e pt e5 permitted by the spacing of the teeth on' edlustmenthof t le t-h nd jaw;

' may be used at will; The adjustable jaw' is cart0-be cast to standard measure v e ha the toothed rod. Occasionally, however,- bastard i n rg V e pertlysin s eslug'rneasures are desired which require an auxony f flle;aedjusting means f the au i iary -iliary adjustment of the left-hand jaw in fracbushing; v Y '50 tions of less than a half-em, and such adl' t- Fi sene arged front iew, partly in sec- 5 0; C 1-ments are now: made by loosening the clamping tionref t en h W in i Q screw 'and turning the bushing to adjust the in- Fig. 6 is an end view-showing a second em .=ner:end thereof the slight extent required. bodiment of the invention;

-Aside from the fact that considerable time and Fig. 7 is a top plan view or the parts shown in 3?uefioz t' are required 15011311118 make an auxiliary "Fig. 6; I

Fig. 8 is a horizontal section, taken along the line 88 in Fig. 6;

Fig. 9 is an end view of the fixed bushing employed in this second embodiment of the invention;

Fig. 10 is an end view of a third embodiment of, the invention;

Fig. 11 is a front view of the parts'shown in Fig. 10; I

Fig. 12 is a vertical section taken along the line I2-I2 in Fig. 10; and

Fig. 13 is a face view of the locking plate employed in this third embodiment of the invention.

A composed line of matrices and spacers when presented at the casting level is confined endwise between a pair of vise jaws III, II, which are carried respectively by angular blocks I2, I3, mounted in a stationary portion I4 of the socalled vise frame. The left-hand block I2 is formed with bearing portions I5, I6, slidably mounted in suitable guideways so that the lefthand jaw I!) may be moved toward and from the fixed opposing right-hand jaw I I to vary the distance therebetween according to the length of the composed lines employed. The movement of the left-hand jaw I0 toward and away from the fixed right-hand jaw II is effected by means of a sustaining member I! mounted in a'carriage 23 arranged at the left of the supporting block I2 and which, like the bearing portions of the block, is mounted in guideways of the viseframe. The

sustaining member I l is adapted and arranged to ,to the vise frame, its engagement with the rod I8 being broken to permit the carriage 23 to be shifted horizontally for setting the jaw I 0 in a desired position with respect to the fixed righthand jaw I I, and its engagement with the rod I8 I being made so as to sustain the jaw Illin desired position. As usual, in such machines, the spacing justed with respect to the right-hand jaw II in ems or half-ems. The operation of the sustaining member Ilto carry itout of engagement with the teeth on the rod I8, the shifting of the carriage 23 to locate the left-hand jaw II] in desired position, and the operation of the sustaining member I I to carry it back into engagement with the teeth on the rod I8, are all effected by means of a horizontally disposed operating rod 24 having a pair of scales 26 (only one being shown) on the right-hand end thereof graduated in half-ems which cooperate with a pointer 25 carried by the vise frame to give a-visible indication of the position at which the left-hand jaw I0 is set. For further details of the mechanism so employed for setting the left-hand jaw ID, reference may be made to U. S. Patent No. 1,839,241 granted to J. G. McNamara, January 5, 1932. r I I At a point between the bearings 20, 2 I, and immediately adjacent the right-hand bearing 2 I,

the rod I8 is provided with a collar 21 keyed thereto by a pin 28 and abutting against aver- .tical reciprocating wedge 29. In rising, the wedge 29 is adapted to move the rod I8 slightly to the right against the action of a spring 30 seated in a recess formed in .the bearing 2!, so as to positionthe jaw I0 exactly to measure preparatory to the expansion of the line between the jaws I0 2 I estates and II, and, in descending, the wedge 29 allows the spring 30 to retract the rod I8 a similar distance in order that the line may be lifted readily from between the jaws I0 and I I for distribution after the casting operation.

Ordinarily the wedge 29 is supported facewise by an anti-wear shoe 32 which banks against theinner .end of an adjustable bushing. threaded through the left-hand bearing 20 and clamped in place by means of a clamping screw/'33, the bushing being so positioned that when the anti-wear shoe 32 banks against the inner end thereof slugs may be cast to standard measures in ems or half-,

ems. Occasionally, however, bastard slug measures are desired which require an auxiliary adjustment of the left-hand jaw ID in fractions otherthan a half-em, and this is ordinarily ac complished by loosening the clamping screw 33 turning the bushing to adjust the inner end I thereof the slight extent desired, and then reillustrated in Figs. 1 to 5 inclusive, theend of the toothed rod I8 is passed through the bushing 38 and the latter threaded through the main bushing 34 which, in turn, is threaded through the usual left-hand split bearing 20. The outer end of the main bushing 34 is provided with a' turning collar 36 recessed circumferentially to produce a hub portion 3'7. During assembly, the main bushing 34 is threaded through the bearing 20 until the inner end thereof is so positioned that, when the anti-wear shoe 32 banks thereagainst, slugs will be cast to standard measures in em'sor half-ems, after which it is clamped in fixed position by means of the clamping screw 33 TIhe'auxiliary bushing 38 is longer than the main'bushing 34 and at its outer end is formed with an annular fiange39 having a recess 40 to receive the hub portion 37 on the turning collar 38, the latter providing a fixed face M and the recess an oppositely disposed face 42 which may be carried into and out of contact with the fixed facesimply by turning-the auxiliary bushing 38.

When the oppositely disposed faces 4| and 42 are brought into contact, the inner-end of the auxiliarybushing 38 protrudes exactly six points beyond the inner end of the main bushing 34, and :1 the pitch of the screwthreads is; such that the {lar39 on the auxiliary bushing 38, and it is pro- 1' vided with a tapped hole to receive the threaded 1 end 44 of a turning pin 45 by means of which the ring 43 may be locked to the collar 353 in a desired position. A set of five washers, designated 46 toEEI in'Fig. 3, varying in thickness from one.

point up to and including fivepoints, is provided for use in connection with this embodiment of the invention, and they are adapted to be placed about the auxiliary bushing 38 and within determined by the banking of the turning pin 45 against a stop pin 5| carried by the bracket 22 (see Figs. 4 and 5). The left-hand jaw I!) may then be adjusted along the toothed rod l8 until the distance between the jaws I0, I Laccord with the length of the standard measure slug it is desired to cast. Under these conditions, when the wedge 29 rises prior to line justification, the antiwear shoe 32 banks against the inner end of the length of the line, say, one point from therneasure for whichthe left-hand jaw is set, the '5 pt. washer 5D is placed in the recess 40 and the auxiliary bushing 38 is then threaded inwardly through the main bushing 34 until the washer is clamped between the oppositely disposed faces-4i and 42, at which time the inner end of the auxiliary bushing protrudes one point beyond the inner end of the main bushing 34. Under these conditions, when the wedge29 rises, since the anti-wear shoe 32 banks against the inner, end of the auxiliary bushing 38, the toothed rod l8 and left-hand jaw M will beset onepointfarth'er to the right than when the shoe banks against the inner end of the main bushing 34.

In like manner when it is desired to cast'slugs reduced in length two points, three points, four points, or five points under the measure for which the left-hand jaw I is set, pt. washer 5i! is replaced with a 4 pt. washer 4%, a3 pt. washer '48, a 2 pt. washer 41, or a 1 pt. washer 46, as the case may be. In making these changes, the ring It will be understood that .in this preferred embodiment, by selecting the appropriate washer 46, 41, 48, 49 or 50, the 'machinemay be adapted to cast slugs to whatever bastard measure may be desired. Normally the parts will be set in the position shown in Figs. 4 and 5, withthe turning pin 45 banking against the stop pin 5l, this being the position of the parts when slugs are to be cast to standard measures in ems or half-ems.- Then in casting slugs to the bastard measure as determined by the. selected washer, the turning pin 45 is moved away from the stop pin 5! until the rotation of the auxiliary bushing 38 is arrested by the selected washer as the latter is clamped between the opposed faces M and 42 on the main and auxiliary bushings respectively. In resetting the machine for standard measure slugs, the turning pin 45 is restored to its "original position in engagement with, the stop pin 5!,withdrawing the auxiliary bushing out of, contacting relation to the wedge shoe 32 and causing it to bank against the main bushing 34,

the second embodiment illustrated in Figs. Gjto 9 inclusive, the auxiliary bushing 55 is slightly mounted in a fixed main bushing 56. The outer end of the main bushing 56 terminates in an annular flange 5,1'having seven detent pockets or recesses 58 formed in the outer face thereof. These detent pockets 58are spaced forty-five degrees apart around the face of the flange 51 ex cept for two adjacent ones (those forthe dial settings of 0 and 1) which are spaced ninety degrees apart. The auxiliary bushing 55 is longer ithanthe main bushing 56, anditv is provided'with I 56 a distance equal to one point.

a stud 5i! which projects into a slot 61' cut in the main bushing, so that the auxiliary bushing may be displaced longitudinally but not rotated with respect to the main bushing. A recessed annular turning member 62, having an offset bearing portion 53 and a retaining collar 64, is mounted on the'outer end of-the main bushing 56 with the bearing portion 63 journaled-on the outer periphery of the annular flange 51 and the retaining collar 64 engaging immediately behind the saidflange.

Anut 65 is threaded into the recessed portionof the turning member 62 and onto the outer end of the auxiliary bushing 55, the arrangement being such that'the nut 65 and theturning member 52 may be rotated as a unit about the main bushing 5t and so cause longitudinal displacement of the auxiliary bushing 55. The pitch of the threads on the auxiliary bushing- 55 is such that foreach forty-five degree rotation of the turning memberBZ and the nut 65 about the main 0 bushing" 55, the'auxiliary bushing 55 is displaced inwardlyor outwardly-through the main bushing To aid the assembly of parts, the annular nut 65 is pr0- vided with a pair of oppositely disposed holes 65 on the" outer face thereof to receive the ends of aspanner wrench. In addition, the annularnut 65 is provided with a drilled hole 51 in which. is

positioned a ball detent 68to cooperate with the pockets 58 formed on the main bushing 55 a spring 69 urging the ball 68 inwardly againstthe face of the annular flange 51 and maintaining it under compression by a setscrew It threaded into the' outer end of the hole. The hole 6'? is so positioned in the annular nut 65 that when the inner end of the auxiliary'bushing 55 is one point to the left or behind the inner end of the main bushing 56, the spring-pressed ball detent 68 is seated in that pocket 58 which corresponds to the zero setting of the dial. -A dial ring H is positioned about the recessed turning member '62 and it is provided with seven indicating marks reading from 0 to 6 and spaced forty-five degrees apart except for the marks 0 and 1 which are spaced ninety degrees apart. The dial ring ll issecured to the turning member by means ofa set screw 12, and during assembly the-ring is "positioned'with the zero mark opposite a pointer 13 carried by the bracket 22.

- In this second embodiment, when it is desired to cast slugs to standard measures in ems or half ems, the anti-wear shoe 32 banks against the inner 'end of the main bushing in the usual manner when the wedge 29 rises prior to line justification. In the event-however, that it is 55 desired to cast slugs to a bastard measure, say

'one point less than the measure for which the .these conditions, when the wedge 29 rises prior to'the justification of the line, the anti-wear shoe 32, which engages the inner end of the auxiliary bushing 55, will set the toothed rod l8 and the left-hand vise jaw Iii one point to the right be- .yond their normal position. In like manner,

when it is desired to shorten the line two points,

three points,.:four points,.five,points', or six points, #5

the turning member 62 is rotated counter-clock- -wise' through an additional forty-five degrees, an

additional ninety degrees, an additional one hundred thirty-five degrees, an additional one hundred eighty degrees, or an'additional two hundred twenty-five .degrees,-as indicated by the marks 2, 3, 4, or 6 on the dial ring H being brought into register with the pointer 13, to set the inner end of the auxiliary bushing 55 corresponding distances beyond the inner .end of the main bushing 55. In the drawings the member 62 is shown in its extreme position of adjustment with the dial marking 6 in register with the pointer. The spring-pressed ball detent 68, by engaging in the appropriate pocket 58, will lock the auxiliary bushing 55 in its various adjusted positions.

After the machine has been set for casting slugs to a bastard measure and it is desired to reset it for casting slugs of standard measure, the turning member 52 is rotated in a clockwise direction to bring .0 on the dial ring 1| back spaced ninety degrees apart.

into register with the pointer 13. To insure this reverse rotation of the dial ring in resetting the machine for standard measure slugs,-the dial ring H may be provided with a stop pin 'Il to engage the pointer 13 in the extreme position of adjustment of the auxiliary bushing, as when themark 6 on the dial ring registers with the pointer 13, thus preventing the operator from turning the dial ring in a counter-clockwise direction from 6 to 0. I

In a third embodimentillustratedin Figs. 10

to 13 inclusive, the auxiliary bushing '75 is.

ner face of the turning disk 11, and the lowerend thereof is slidably mounted on a stud 85 threaded into the outer end of a second stud 86 carried by the bracket 22, the arrangement being such that when the disk ll is turned to move the auxiliary bushing 15 inwardly or outwardly through the main bushing 16 the plate 19 slides back and forth on the stud 85 but does not turn. On its outer face, the plate 19 is provided with seven detent pockets or recesses spaced apart in accordance with the dial markings on the turning disk ll, and the latter is provided with a drilled hole 3! in which is positioned a ball detent 82 to cooperate with the detent pockets 86 and actuated by a spring 83 reacting against a set screw 85 threaded intothe outer end of the drilled hole. The pitch of the teeth on the bushings f5 and T6 is such that the auxiliary bushing 15 is displaced exactly one point with respect to the main bushing 16 during each forty-five degree rotation of the turning disk Ti.

In assembly, the disk TI is positioned with the dial mark 0 in register with a horizontal shoulder 81 formed on the plate '59 and constituting a pointer. The spring-pressed ball detent 82 is then seated in that pocket 80 from which it is necessary to rotate the disk clockwise through ninety degrees to carry the detent to the next pocket, and the inner end of the auxiliary bushing 15 is' positioned one point behind or tothe left of the inner end of the main bushing 16. Under these normal conditions, the slugs will be cast to standard measures in ems or half-ems,

the anti-wear shoe 32 banking against the inner end of the main fixed bushing 16 in the usual manner when the Wedge Zilrises prior to the line When, howeve'riit is' desired to-- cast slugs to bastard measure, say one point less than the measure for which the jaws have been justification.

beyond their normal position. In like manner when itis desired to cast slugs two,'three, four, five, or even six points less than the measure for which the jaws it, ll, have been set, the,

disk 11 is turned through an additional fortyfive degrees, an additional ninety degrees, an additional one-hundred thirty-five degrees, an additional one hundred eighty degrees, or an additional twohundred twenty-five degrees, as indicated by thedial markings2, 3,4, 5 and 6 being brought into register with the'pointer 81, to set the inner end of the auxiliary bushing 15 corresponding distances'beyond the inner end of the main bushing 15, the spring-pressed ball detent 82 acting automatically to lock the auxiliary bushing in its various adjusted positions.

The disk '77 may be provided with a stop pin 88 to engage the pointer 81 in its extreme position of adjustment as indicated by the dial marking 6, thus compelling the operator-to turn the disk in alcounterclockwise direction in restoring the dial marking 0 in register with the pointer when the machine is to be reset for casting standard measure slugs. I

Having'thus described our invention, what we claim is:

1. In a slug casting machine, the combination of an adjustable jaw, a relatively fixed jaw, a toothed rod to which said adjustable jaw may be locked in different positions with respect to said fixed jaw for slugv measures of, ems and halfems, means for locating said rod in one position vll) when it is desired to cast slugs of such coarser measures,-and auxiliary means for locating said rod in other positions when it is desired to cast slugs of finer measuresr 2. In a slug casting machine, the combination of an adjustable jaw, a relatively fixed jaw, a toothed rod to which said adjustable jaw may be locked in different positions with respect to said fixed jaw for slug measures of ems and halfems, means for locating said rodin one position when it is desired to cast slugs of such coarser measures, and auxiliary means for 10- cating said rod in other positions when it is desired to'cast slugs point fractions short of ,the'

em or half-em measure for'which the jaws are set.

of an adjustable jaw, a relatively fixed jaw, a toothed rod to locate said adjustable rod in different positions, and means for adjusting the 3. In a slug casting machine, the combination;

for said rod having a pair of bushings, one being adjustable relatively to the other.

4. In a slug casting machine, the combination of an adjustable jaw, a relatively fixed jaw, a toothed rod, a bearing having a fixed main bushing and an adjustable auxiliary bushing in which one end of said rod is fitted, means including said fixed main bushing for locating the rod endwise in one position for slug measures of ems or halfems, and means including said adjustable auxiliary bushing for locating said rod endwise in other positions for slug measures in fractions of less than a half-em.

5. In a slug casting machine, the combination of an adjustable jaw, a relatively fixed jaw, a

toothed rod, means for locking said adjustable jaw to said rod in positions which differ inhalfems with respect to said fixed jaw, a bearing for said rod, means for imparting limited endwise movement to said rod with respectto said bearing, a fixed main bushing carried by said bearing and adapted to so locate said rod; before the endwise movement thereof that the em or half-em measure for which the jaws are set is obtained, and an adjustable auxiliary bushing carried by i said bearing and adapted to so locate said rod ems with respect to said fixed jaw, a bearing for I said rod, means for imparting limited endwise movement to said rod with respect to said hearing, a main bushing fixed in said bearing and adapted toso locate said rod before the endwise movement thereof that the em or half-em measure for which the jaws are set is obtained,

and an adjustable auxiliary bushing mounted in said fixed main bushing and adapted to so locate said rod before the endwise movement thereof that the em or half-em measurefor which the jaws are set is changed a desired fraction of less than a half-em.

'7. In a slug casting machine, the combination of an adjustable jaw, a relatively fixed jaw, a toothed rod, means for locking said adjustable jaw to said rod in positions which differ in halfezns with respect to said fixed jaw, a bearing for said rod, means for imparting limited endwise mo-vementto said rod, a fixed main bushing in said bearing and adapted toso locate said rod before the endwise movement thereof that the em or half-em measure for which the jaws are set is obtained, an adjustable auxiliary bushing mounted in said fixed bushing and adapted to change the location of said rod before the endwise movement'thereof, and means for so adjusting said auxiliary bushing in said fixed bushing that the position of said rod is changed a desired fraction of less than a half-em before the end- I wise movement thereof.

8. In a slug casting machine, the combination of an adjustable jaw, a relatively fixed jaw, a

toothed rod, means for locking said adjustable jaw to said rod in positions which differ in halfems with respect to said fixed jaw, a bearing for said rod, means for imparting limited endwise movement to said rod, a fixed main bushing in said bearing and adapted to so locate said rod before the endwise movement thereof that the em or half-em measure for which the jaws are set is obtained, an adjustable auxiliary bushing mounted in said fixed bushing and adapted to change the location of said rod before the endwise movement thereof,*mean for so adjusting the auxiliary bushing in said fixed bushing that the position of said rod is changed a desired fraction of less than a half-em before the'endwise movement thereof, and means forlocking sai auxiliary bushing in adjusted position. 9. In a slug casting machine, the combination of an adjustable jaw, a relatively fixed'jaw, a toothed rod, means for locking said adjustable jaw to said rod in positions which differ in halfems with respect to said fixed jaw, a bearing for said rod, means for imparting limited endwise movement to said rod, a fixed main bushing in said bearing and adapted to so locate said rod before the endwise movement thereof that the em or half-em measure for which the jaws are set is obtained, an adjustable auxiliary bushing mounted in said fixed bushing and adapted to change the location of said rod before the endwise movement thereof, means for so adjusting the auxiliary bushing in said fixed main bushing .that the position. of said rod is changed a detions with respect to said fixed jaw, a bearing for I said rod, afixed main bushing threaded in said bearing and adapted to locate said rod in one position for slug measures of ems or half-ems,

tween it and the main bushing, said washer. being one of a set of varying dimensions and replaceable at will by any other washer of the set.

13. A combination according to. claim l0,

wherein the auxiliary bushing is provided with a dial graduated for point adjustments of the toothed rod.

14. A combination according to claim 10, wherein the auxiliary bushing is provided with a dial graduated for point adjustments of the toothed rod, 'and wherein the dial markings 0 and l are more widely spaced apart than the scribed.

remaining dial markings, for'the purpose de 15. A combination according to claim 10,1

wherein the auxiliary bushing may be located in one or another of a series of adjusted positions according to the point dimensions of the slug measures desired. I

16. A combination according to claim 10, wherein the auxiliary bushing is provided with a dial graduated for point adjustments of the toothed rod and with a locking detent to hold said bushing in one or another of its adjustedpositions.

HERMAN T. sUNDs'moM. CLARENCE A. STOPPLE. 

